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Patented July 6,1880.

H. A. JAMIESON. Pump UNITED STATES PATENT OFFICE.

HENRY A. JAMIESON, OF BROOKLYN, NEW YORK.

PUMP.

SPECIFICATION forming part of Letters Patent No. 229,612, dated July 6, 1880.

Application filed April 23, 1880. (No model.)

To all whom t may concern:

Beit known that I, HENRY A. J AMIEsoN, of Brooklyn, Kings county, New York, have invented an Improvement in Pumps, of which the following is a specification.

My invention is an improvement in pumps; and it consists in making the valve-chests, valve-seats, and connections, as fully described hereinafter, so as to simplify the construction, facilitate the attachment of the parts to their places, and permit ready access thereto.

In the drawings forming part of this speciflcation, Figure l is alongitudinal section of a pump-cylin der and chest, showing my invention. Fig. 2 is a transverse section.

The cylinder A, the chest A', containing the inlet and outlet ports and passages, and cap A2, containing the discharge-chamber K, as shown, do not differ materially from ordinary constructions, and may be varied as occasion requires. D is the piston, reciprocating in the cylinder.

Within the chest A are the seats O C B B of the valves c c b b, the lower being the inlet and the upper the outlet valves. Each seat C is threaded externally and adapted to athreaded opening in the lower partition, G, of the chest, and each seat B has a beveled edge, h, ground to tit the beveled edge of an opening in the upper partition, H.

A stein, a, threaded at the lower end, screws into a threaded socket in each valve-seat O, and is enlarged toward the upper end to form an annular shoulder, e, which is beveled and ground to a central bearing of the valve-seat B, through which the stem passes.

The valves c play upon the lower ends of the stems, and are pressed upon their seats by volute springs J, bearing at their upper ends against the seats B, and the valves b are depressed by similar springs J, having their upper bearings against cross-bars a, which serve as ready means for turning the stems to bring each beveled shoulder e to bear rmly upon its valve-seat B, thereby forcing the beveled edge of the latter into close contact with the edge of its socket.

Either valve-seat B may be readily removed by unscrewing the stem c, thereby affording easy access to the seat, valve, and spring bestruction may be made use of, irrespective of 6o the number of valves and seats employed, and that the seats B may be secured by shouldered stems, as described, in cases where the seats C are not detachable, but constitute part ot' the casting.

ln some cases the shoulders e may be abrupt, and packings may be placed beneath them; but I prefer the form shown. The seats B may also have iiat bearings.

The arrows l indicate the incoming currents, and the arrows 2 the discharge-currents.

I claiml. The combination, in a pump, of a beveledged seat, B, adapted to a corresponding opening, and a stem, a, screwing into a seat below the seat B, and provided with an annular beveled shoulder, c, adapted to a corresponding bearing of the valve-seat B, substantially as set forth.

2. Thecombination, in apump, ofthe threaded seats O, detachable seats B, valves b c, and stems c, having shoulders c and threaded lower ends, substantially as set forth.

' 3. The stems a, threaded at the ends, provided with shoulders e and cross-heads n, in combination with the valve-seats B C, valves b c, and springs, substantially as set forth.

4:. The valve-chest, its partition G, threaded opening' and seat O, partition H, having a beveled opening affording a bearing for the seat B, in combination with the shouldered stem a and spring-valves, constructed substantially as set forth.

In testimony whereof I have signed myname to this specification in the presence of two subscribin g witnesses.

HENRY A. JAMIESON.

Witnesses EDWARD Focus, GEORGE H. PRICE. 

